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Site Background Information: Cancun Restaurant Page 2 of 4 concentrations. Also, Naphthelene, 1 ,2 Dichloroethane (1,2 DCA), and various Benzene compounds impacted the soil at low concentrations. • Soil samples were analyzed by EPA Method 6010B for the five LUFT metals. Of the five metals tested, three: Nickel, Zinc, and Chromium, were detected at low concentrations. • Chromium VI was detected in the soil and west wall sample collected using the EPA 7196A Method. SITE ASSESSMENT ACTIVITIES On 11 February 2008, AGE published Underground Storage Tank Removal Soil Sample Analysis which reported the removal of the underground storage tank and associated soil sampling. On 02,03,04, and 09 June 2008, five soil probe borings (131 though 65)were advanced at the site utilizing a van-mounted Geoprobe 5400. Boring B1 was advanced in the former tank pit to a depth of approximately 60 feet bsg. Boring B2 was advanced to a depth of 60 feet bsg, located 50 feet north of B1. Boring B3 was advanced to a depth of approximately 53 feet bsg at which point probe advancement ceased due to subsurface refusal, located 80 feet east of B1. Soil boring locations and documented subsurface utilities with the proposed monitoring well locations are depicted on Figure 5. Samples were collected from the borings at discrete five-foot intervals. A total of five soil samples were analyzed for petroleum hydrocarbon products. The following target analytes were detected: • TPH-g was detected in soil samples collected from borings B1 and B2 at a maximum concentration of 500 milligrams per kilogram (mg/kg) in boring B1 at 25 feet bsg. • Toluene, ethylbenzene and xylenes were detected in borings 131 and B2 at maximum concentrations of 0.017 mg/kg toluene (132-45), 0.017 mg/kg ethylbenzene (132-45) and 6.3 mg/kg xylenes (132-35). • EDB was detected in one soil sample at a concentration of 0.045 mg/kg (132-35). No other target analytes were detected at or above laboratory detection limits in any of the samples analyzed. On 28 September 2008, AGE published Preliminary Site Assessment Report which reported all site activities, findings, and recommendations for the initial investigative work plan. Advanced CcoEnviron nenlal,Inc.